如何從 json 內容中提取鍵和值？

Question

我試過的是這個。

public function toArrayss(){

        $json = '{"notificationType":"Bounce","bounce":{"feedbackId":"010201762c4054a2-424cab55-f6b7-420c-8f51-f1f13cb8b702-000000","bounceType":"Transient","bounceSubType":"General","bouncedRecipients":[{"emailAddress":"chintu@mailinatorc.com","action":"failed","status":"4.4.7","diagnosticCode":"smtp; 554 4.4.7 Message expired: unable to deliver in 840 minutes.<421 4.4.0 Unable to lookup DNS for mailinatorc.com>"}],"timestamp":"2020-12-04T05:36:22.000Z","reportingMTA":"dsn; a4-1.smtp-out.eu-west-1.amazonses.com"},"mail":{"timestamp":"2020-12-03T13:58:22.222Z","source":"ooionline@opsimplify.com","sourceArn":"arn:aws:ses:eu-west-1:128134649499:identity/opsimplify.com","sourceIp":"3.248.44.136","sendingAccountId":"128134649499","messageId":"0102017628e5910e-f8d2fba5-c25f-4109-8571-246ca3c983b2-000000","destination":["chintu@mailinatorc.com"],"headersTruncated":false,"headers":[{"name":"Received","value":"from sharabh.ooionline.com (ec2-3-248-44-136.eu-west-1.compute.amazonaws.com [3.248.44.136]) by email-smtp.amazonaws.com with SMTP (SimpleEmailService-d-8DMC1AGE7) id zcEZl2C63kMsDHYhlI2W for chintu@mailinatorc.com; Thu, 03 Dec 2020 13:58:22 +0000 (UTC)"},{"name":"Date","value":"Thu, 3 Dec 2020 14:58:22 +0100"},{"name":"To","value":"chintu@mailinatorc.com"},{"name":"From","value":"OPSimplify <ooionline@opsimplify.com>"},{"name":"Reply-To","value":"Email Notification <noreply@opsimplify.com>"},{"name":"Subject","value":"Votre accès à la plateforme collaborative SHARABH"},{"name":"Message-ID","value":"<PhTQOVF4ZuRS5icap8Bt6u6KCcBd3l2ihs2RPqYmpI@sharabh.ooionline.com>"},{"name":"X-Mailer","value":"PHPMailer 6.0.7 (https://github.com/PHPMailer/PHPMailer)"},{"name":"MIME-Version","value":"1.0"},{"name":"Content-Type","value":"text/html; charset=UTF-8"}],"commonHeaders":{"from":["OPSimplify <ooionline@opsimplify.com>"],"replyTo":["Email Notification <noreply@opsimplify.com>"],"date":"Thu, 3 Dec 2020 14:58:22 +0100","to":["chintu@mailinatorc.com"],"messageId":"<PhTQOVF4ZuRS5icap8Bt6u6KCcBd3l2ihs2RPqYmpI@sharabh.ooionline.com>","subject":"Votre accès à la plateforme collaborative SHARABH"}}}
';
        $objs = json_decode($json,true);

        $key = ['notificationType','bounceType','bounceSubType','timestamp'];
        foreach ($objs as $obj => $values )  {
            // echo $obj . ":". $values;
            dd($objs);
            // echo $values ;

        }

誰能幫我提取諸如notificationType、bounceType、timestamp等鍵和值； 如果有人幫助我實現這一目標，那對我來說將是很大的幫助。 謝謝你。

Answer 1

json_decode 解碼一個字符串，將其轉換為 php 數據結構：數組或 object。 檢查json_decode的文檔。

如果將第二個參數作為 false 傳遞，則會得到 object：

<?php

$decoded = json_decode(..., false);

echo $decoded->notificationType;

如果將 true 作為第二個參數傳遞，則獲取關聯數組

<?php

$decoded = json_decode(..., true);

echo $decoded['notificationType'];

您的問題是您將返回的數組作為通知集合處理。 請注意，$objs 僅包含單個通知 object。

<?php
function toArrayss() {
    
    $json = '{"notificationType":"Bounce","bounce":{"feedbackId":"010201762c4054a2-424cab55-f6b7-420c-8f51-f1f13cb8b702-000000","bounceType":"Transient","bounceSubType":"General","bouncedRecipients":[{"emailAddress":"chintu@mailinatorc.com","action":"failed","status":"4.4.7","diagnosticCode":"smtp; 554 4.4.7 Message expired: unable to deliver in 840 minutes.<421 4.4.0 Unable to lookup DNS for mailinatorc.com>"}],"timestamp":"2020-12-04T05:36:22.000Z","reportingMTA":"dsn; a4-1.smtp-out.eu-west-1.amazonses.com"},"mail":{"timestamp":"2020-12-03T13:58:22.222Z","source":"ooionline@opsimplify.com","sourceArn":"arn:aws:ses:eu-west-1:128134649499:identity/opsimplify.com","sourceIp":"3.248.44.136","sendingAccountId":"128134649499","messageId":"0102017628e5910e-f8d2fba5-c25f-4109-8571-246ca3c983b2-000000","destination":["chintu@mailinatorc.com"],"headersTruncated":false,"headers":[{"name":"Received","value":"from sharabh.ooionline.com (ec2-3-248-44-136.eu-west-1.compute.amazonaws.com [3.248.44.136]) by email-smtp.amazonaws.com with SMTP (SimpleEmailService-d-8DMC1AGE7) id zcEZl2C63kMsDHYhlI2W for chintu@mailinatorc.com; Thu, 03 Dec 2020 13:58:22 +0000 (UTC)"},{"name":"Date","value":"Thu, 3 Dec 2020 14:58:22 +0100"},{"name":"To","value":"chintu@mailinatorc.com"},{"name":"From","value":"OPSimplify <ooionline@opsimplify.com>"},{"name":"Reply-To","value":"Email Notification <noreply@opsimplify.com>"},{"name":"Subject","value":"Votre accès à la plateforme collaborative SHARABH"},{"name":"Message-ID","value":"<PhTQOVF4ZuRS5icap8Bt6u6KCcBd3l2ihs2RPqYmpI@sharabh.ooionline.com>"},{"name":"X-Mailer","value":"PHPMailer 6.0.7 (https://github.com/PHPMailer/PHPMailer)"},{"name":"MIME-Version","value":"1.0"},{"name":"Content-Type","value":"text/html; charset=UTF-8"}],"commonHeaders":{"from":["OPSimplify <ooionline@opsimplify.com>"],"replyTo":["Email Notification <noreply@opsimplify.com>"],"date":"Thu, 3 Dec 2020 14:58:22 +0100","to":["chintu@mailinatorc.com"],"messageId":"<PhTQOVF4ZuRS5icap8Bt6u6KCcBd3l2ihs2RPqYmpI@sharabh.ooionline.com>","subject":"Votre accès à la plateforme collaborative SHARABH"}}}
';
    $objs = json_decode($json, true);
    
    $key = ['notificationType', 'bounceType', 'bounceSubType', 'timestamp'];
    foreach ($objs as $obj => $values) {
        // echo $obj . ":". $values;
        dd($objs);
        // echo $values ;
        
    }
}

像這樣修改你的代碼

<?php

public function toArrays($json) {
    
    // if the json string contains a collection of notifications
    // this line returns an array that contains multiple notifications
    // in the other hand, if the json string contains a single notification object
    // this line returns a single notification as array
    return json_decode($json, true);
}

通過這種方式，您將收到 json 內容作為參數，而 toArrays 方法僅對其進行解碼並作為數組返回。 您可以使用 foreach 對其進行迭代，並且可以以傳統方式訪問索引。

<?php

$asArray = $someObject->asArrays($someJsonString);

echo $asArray['some_property'];

foreach ($asArray as $key => $value) {
    echo ">" . $key;

    if (is_array($value)) {
        foreach ($value as $subKey => $subValue) {
            echo ">>>" . $subKey . "\n";
            echo ">>>>" . $subValue . "\n";
        }
    } else {
        echo ">>" . $value . "\n";
    }
}